diff --git a/.github/MAINTAINERS.md b/.github/MAINTAINERS.md
index e8321dd3b9..15ef191ead 100644
--- a/.github/MAINTAINERS.md
+++ b/.github/MAINTAINERS.md
@@ -48,6 +48,29 @@ function; create it once from **Issues → Labels** if it is missing.
 Applying `open-for-contribution` is currently a **manual step** — do it on the GitHub
 issue directly (from the GitHub UI, or from the Linear-linked issue).
 
+## `run-ci`: full develop CI on stacked or draft PRs
+
+Ready (non-draft) PRs targeting `develop` already get the default suite: Test
+(check / unit+integration / e2e), preview CLI packages, and PR-title lint.
+
+Stacked PRs (base is another PR branch) and drafts do **not** get that suite
+unless they carry the **`run-ci`** label. [`run-ci.yml`](./workflows/run-ci.yml)
+then calls Test and preview-package publish as reusable workflows, including
+while the PR is still a draft.
+
+- Add `run-ci` to start (or resume) the suite; remove it to cancel in-progress
+  `run-ci` runs via that workflow's concurrency group.
+- Other labels do not start or cancel Test / preview. PR-title lint may
+  retrigger because that check is cheap.
+- After a stacked PR is retargeted onto `develop`, push or reopen so the
+  native required checks (`Check code quality`, etc.) populate. The opt-in
+  suite uses different check names (`Test / Check code quality`).
+- This is independent of `run-live-e2e-ci`, which opts into the separate
+  supabox live e2e dispatch.
+
+The `run-ci` label must exist as a repository label; create it from
+**Issues → Labels** if it is missing.
+
 ## Deferred: automatic Linear → GitHub label sync
 
 We considered auto-applying `open-for-contribution` when a Linear issue moves out of
diff --git a/.github/workflows/lint-pull-request.yml b/.github/workflows/lint-pull-request.yml
index a2ba597315..c70377a830 100644
--- a/.github/workflows/lint-pull-request.yml
+++ b/.github/workflows/lint-pull-request.yml
@@ -2,6 +2,10 @@ name: Lint Pull Request
 
 # Release-notes PRs (head ref `release-notes/*`) skip CI; only
 # apply-release-notes.yml runs for those.
+#
+# Draft PRs skip this check unless they carry `run-ci` (same opt-in as Test
+# and preview packages). Label events retrigger this cheap check so adding
+# `run-ci` on a draft starts lint without waiting for a push.
 on:
   pull_request_target:
     types:
@@ -10,6 +14,8 @@ on:
       - synchronize
       - reopened
       - ready_for_review
+      - labeled
+      - unlabeled
   merge_group:
     types:
       - checks_requested
@@ -29,7 +35,8 @@ jobs:
       github.event_name == 'merge_group' ||
       (github.event_name == 'pull_request_target' &&
         !startsWith(github.event.pull_request.head.ref, 'release-notes/') &&
-        github.event.pull_request.draft == false)
+        (github.event.pull_request.draft == false ||
+          contains(github.event.pull_request.labels.*.name, 'run-ci')))
     name: Lint Pull Request
     runs-on: ubuntu-latest
     steps:
diff --git a/.github/workflows/publish-preview-cli-packages.yml b/.github/workflows/publish-preview-cli-packages.yml
index afbc6ec537..5282341687 100644
--- a/.github/workflows/publish-preview-cli-packages.yml
+++ b/.github/workflows/publish-preview-cli-packages.yml
@@ -2,6 +2,9 @@ name: Publish Preview CLI Packages
 
 # Release-notes PRs (head ref `release-notes/*`) are markdown-only and are not
 # meant to produce installable preview packages.
+#
+# Default path: ready (non-draft) PRs targeting `develop`.
+# `run-ci.yml` calls this workflow for drafts and stacked / non-develop PRs.
 on:
   pull_request:
     types:
@@ -9,22 +12,35 @@ on:
       - synchronize
       - reopened
       - ready_for_review
+      - converted_to_draft
     branches:
       - develop
+  workflow_call:
+    inputs:
+      force:
+        description: Publish even when the PR is a draft (used by run-ci.yml)
+        type: boolean
+        default: false
+    secrets:
+      DF_FIREWALL_TOKEN:
+        required: true
 
 permissions:
   actions: read
   contents: read
 
+# Literal prefix: called workflows inherit github.workflow from the caller
+# (`run-ci`). `inputs.force` separates this call from a skipped native run on
+# a develop draft.
 concurrency:
-  group: ${{ github.workflow }}-${{ github.head_ref }}
+  group: publish-preview-cli-packages.yml-${{ github.event.pull_request.number || github.head_ref }}-${{ inputs.force && 'run-ci' || 'direct' }}
   cancel-in-progress: true
 
 jobs:
   build:
     if: |
       !startsWith(github.head_ref, 'release-notes/') &&
-      github.event.pull_request.draft == false
+      (inputs.force || github.event.pull_request.draft == false)
     name: Build preview CLI packages
     uses: ./.github/workflows/build-cli-artifacts.yml
     with:
@@ -37,7 +53,7 @@ jobs:
     needs: build
     if: |
       !startsWith(github.head_ref, 'release-notes/') &&
-      github.event.pull_request.draft == false &&
+      (inputs.force || github.event.pull_request.draft == false) &&
       needs.build.result == 'success'
     name: Publish preview package
     runs-on: blacksmith-8vcpu-ubuntu-2404
@@ -121,7 +137,7 @@ jobs:
     needs: publish
     if: |
       !startsWith(github.head_ref, 'release-notes/') &&
-      github.event.pull_request.draft == false &&
+      (inputs.force || github.event.pull_request.draft == false) &&
       needs.publish.result == 'success'
     name: Post preview command comment
     runs-on: ubuntu-latest
diff --git a/.github/workflows/run-ci.yml b/.github/workflows/run-ci.yml
new file mode 100644
index 0000000000..c3dffb9788
--- /dev/null
+++ b/.github/workflows/run-ci.yml
@@ -0,0 +1,67 @@
+name: run-ci
+
+# Opt-in full develop CI for PRs that Test.yml / preview do not already cover:
+# stacked PRs (base is not develop) and drafts. Ready develop PRs stay on the
+# existing workflows so required check names and concurrency are unchanged.
+#
+# Add the `run-ci` label to start the suite; remove it to cancel in-progress
+# runs via this workflow's concurrency group. Other labels do not retrigger.
+on:
+  pull_request:
+    types:
+      - opened
+      - synchronize
+      - reopened
+      - ready_for_review
+      - labeled
+      - unlabeled
+      - converted_to_draft
+
+permissions:
+  actions: read
+  contents: read
+  pull-requests: write
+
+# Unrelated label events still start a run; give them a unique group so they
+# cannot cancel an in-progress suite. Removing `run-ci` stays on the main
+# group and cancels via cancel-in-progress.
+concurrency:
+  group: >-
+    run-ci.yml-${{ github.event.pull_request.number || github.ref }}${{
+      ((github.event.action == 'labeled' || github.event.action == 'unlabeled')
+        && github.event.label.name != 'run-ci'
+        && format('-noop-{0}', github.run_id))
+      || ''
+    }}
+  cancel-in-progress: true
+
+jobs:
+  test:
+    name: Test
+    if: |
+      !startsWith(github.head_ref, 'release-notes/') &&
+      contains(github.event.pull_request.labels.*.name, 'run-ci') &&
+      (github.event.pull_request.draft || github.base_ref != 'develop') &&
+      ((github.event.action != 'labeled' &&
+          github.event.action != 'unlabeled') ||
+        github.event.label.name == 'run-ci')
+    uses: ./.github/workflows/test.yml
+    with:
+      force: true
+    secrets:
+      DF_FIREWALL_TOKEN: ${{ secrets.DF_FIREWALL_TOKEN }}
+
+  preview:
+    name: Preview packages
+    if: |
+      !startsWith(github.head_ref, 'release-notes/') &&
+      contains(github.event.pull_request.labels.*.name, 'run-ci') &&
+      (github.event.pull_request.draft || github.base_ref != 'develop') &&
+      ((github.event.action != 'labeled' &&
+          github.event.action != 'unlabeled') ||
+        github.event.label.name == 'run-ci')
+    uses: ./.github/workflows/publish-preview-cli-packages.yml
+    with:
+      force: true
+    secrets:
+      DF_FIREWALL_TOKEN: ${{ secrets.DF_FIREWALL_TOKEN }}
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index b0d4754442..daaf76f68d 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -2,6 +2,9 @@ name: Test
 
 # Release-notes PRs (head ref `release-notes/*`) only add markdown under
 # `release-notes/` and are published via approval — skip the full CI suite.
+#
+# Default path: ready (non-draft) PRs targeting `develop`, plus the merge queue.
+# `run-ci.yml` calls this workflow for drafts and stacked / non-develop PRs.
 on:
   pull_request:
     types:
@@ -9,6 +12,7 @@ on:
       - synchronize
       - reopened
       - ready_for_review
+      - converted_to_draft
     branches:
       - develop
   merge_group:
@@ -16,13 +20,26 @@ on:
       - checks_requested
     branches:
       - develop
+  workflow_call:
+    inputs:
+      force:
+        description: Run the suite even when the PR is a draft (used by run-ci.yml)
+        type: boolean
+        default: false
+    secrets:
+      DF_FIREWALL_TOKEN:
+        required: true
 
 permissions:
   contents: read
   actions: read
 
+# Literal prefix: called workflows inherit github.workflow from the caller
+# (`run-ci`), which would cancel the caller and the preview call. `inputs.force`
+# keeps a skipped native Test run on a develop draft from cancelling the
+# forced run-ci call.
 concurrency:
-  group: ${{ github.workflow }}-${{ github.head_ref || github.ref }}
+  group: test.yml-${{ github.event.pull_request.number || github.head_ref || github.ref }}-${{ inputs.force && 'run-ci' || 'direct' }}
   cancel-in-progress: true
 
 jobs:
@@ -30,6 +47,7 @@ jobs:
     if: |
       !startsWith(github.head_ref, 'release-notes/') &&
       (github.event_name == 'merge_group' ||
+        inputs.force ||
         github.event.pull_request.draft == false)
     name: Check code quality
     runs-on: blacksmith-8vcpu-ubuntu-2404
@@ -53,6 +71,7 @@ jobs:
     if: |
       !startsWith(github.head_ref, 'release-notes/') &&
       (github.event_name == 'merge_group' ||
+        inputs.force ||
         github.event.pull_request.draft == false)
     name: Run unit and integration tests
     runs-on: blacksmith-8vcpu-ubuntu-2404
@@ -76,6 +95,7 @@ jobs:
     if: |
       !startsWith(github.head_ref, 'release-notes/') &&
       (github.event_name == 'merge_group' ||
+        inputs.force ||
         github.event.pull_request.draft == false)
     name: Run end-to-end tests (shard ${{ matrix.shard }}/3)
     runs-on: blacksmith-8vcpu-ubuntu-2404
@@ -90,9 +110,18 @@ jobs:
           fetch-depth: 0
 
       - name: Set base and head SHAs for affected
-        if: github.event_name == 'pull_request'
+        if: github.event.pull_request && !inputs.force
         uses: nrwl/nx-set-shas@afb73a62d26e41464e9254689e1fd6122ee683c1 # v5.0.1
 
+      # Reusable calls inherit the caller's github context (event_name stays
+      # pull_request). Use the PR payload directly so we do not depend on
+      # nx-set-shas understanding the caller event.
+      - name: Set base and head SHAs for run-ci reusable call
+        if: inputs.force && github.event.pull_request
+        run: |
+          echo "NX_BASE=${{ github.event.pull_request.base.sha }}" >> "$GITHUB_ENV"
+          echo "NX_HEAD=${{ github.event.pull_request.head.sha }}" >> "$GITHUB_ENV"
+
       - name: Set base and head SHAs for merge queue affected
         if: github.event_name == 'merge_group'
         run: |
@@ -173,6 +202,7 @@ jobs:
       always() &&
       !startsWith(github.head_ref, 'release-notes/') &&
       (github.event_name == 'merge_group' ||
+        inputs.force ||
         github.event.pull_request.draft == false)
     name: Run end-to-end tests
     needs: test-e2e